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She has tears in her eyes. She ______ be sad.
must
He ______ be the new student — I’ve never seen him before.
might
You ______ be serious! That’s the funniest thing I’ve ever heard.
can't
It’s 8:00 a.m. and she’s not here yet. She ______ be late.
must
He’s laughing really hard. It ______ be a comedy show.
must
That ______ be Maria’s voice. It sounds very different!
can't
There’s someone at the door. It ______ be the pizza delivery guy.
might
This place is so fancy — it ______ cost a lot to stay here.
must
She says she’s 18, but she looks 12! She ______ be 18.
can't
They ______ be best friends. They always sit together.
must
